Instruction manual

Fieldbus Interface
129
The module is equipped with four status LEDs mounted at the front of the card and one watchdog
LED mounted in the middle of the card, used for debugging purposes. The function of the LEDs is
described in the figure and tables below. Of the four status LEDs, three of them indicate network
and module status, and one is reserved for future use.
Status LEDs Description
MBP Active – flash every 160 msec. Device operational
MBP Active – flash every 1 sec. In Monitor_Offline state
MBP Active – 2 flashes, off 2 sec. In MAC_IDLE never-getting-
token state
MBP Active – 3 flashes, off 1.7 sec. Not hearing other nodes
MBP Active – 4 flashes, off 1.4 sec. Duplicated node address
detected on the network
Error – steady green Link OK, on-line, connected
Error – steady red Critical link failure
MBP Init – steady green Connection initialized
MBP Init – steady red Connection time-out
Watchdog LED Color Frequency
No firmware exists Red 8Hz
Firmware downloading Red/Green 1Hz
ROM check fault Red 2Hz
Module not initialized Green 2Hz
Module initialized and running OK Green 1Hz
RAM check fault Red 1Hz
DPRAM check fault Red 4Hz
Error
MBP Init
Reserved
MBP Active